The results(indicated) that the approximate analysis of the pulverized coal changed to different degrees, and the particle size distribution mainly depended on the coal rank but not the HGI.
试验结果表明，经过哈氏可磨性测定仪后，各煤种的工业分析都发生了不同程度的变化，而煤粉破碎后的粒度分布取决于煤种的煤化程度，而与煤种的可磨性指数相关性较小。
On the basis of the classification, the evolution and distribution of properties of pore of the high rank coal in China were discussed.
据此分类对我国高煤级煤孔隙性质的分布及演化规律进行了探讨。
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